Membership. Knowledge. Vigilance.
Take action to protect the health of Lake Monomonac
Who We Are
The MLPOA is an all-volunteer, non-profit organization dedicated to the health and preservation of Lake Monomonac in Rindge, NH. Please join us as we strive to mitigate potential pollution in our lake and surrounding watershed.
Watershed Management Plan
The most comprehensive study ever undertaken of Lake Monomonac is helping us better understand the lake’s challenges, identify practical solutions, and chart a course for its long-term protection.
Join Us
Help us protect our beautiful lake by joining the Monomonac Lake Property Owners Association. Maintaining and growing our membership is essential to protecting the health of the lake and preserving it for future generations. By becoming a member, you’ll stay informed about the work being done to protect the lake and be given opportunities to help support these efforts. MLPOA is a 501(c)(3) nonprofit organization, so your membership dues are tax deductible.
Save the Date: Annual Meeting
Mark your calendar for our annual meeting to be held on Saturday July 18, 2026 at the Rindge Wellington Rec Center. Meeting begins at 9 am (Come at 8:30 to chat with your neighbors over coffee.)
What Is that Yellow Buoy Doing On Our Lake?
MLPOA and WSLA are pleased to share that a solar-powered water monitoring buoy has been deployed on Lake Monomonac. It is located to the northeast of the Santa Maria, near where the ski course is located. The buoy will continuously monitor lake conditions through mid-November, providing multi-depth data and scientific analysis on water quality indicators including cyanobacteria, algae, temperature, dissolved oxygen, and turbidity. We are currently in an evaluation period and will share additional information after we have had an opportunity to assess the data and reporting capabilities.
Cyanobacteria Bloom Observed
June 2, 2026: NHDES has reported two possible blooms on the lake. They have not been confirmed. NH DES limnologists will be on the lake June 4th for Lake Ed Day and will collect samples to test. If you see a bloom, please report it to MLPOA and NHDES!
LakeSmart
LakeSmart is a free, non-regulatory, voluntary education and recognition program offered by NH LAKES. The goal of LakeSmart is to encourage property owners to maintain their home and property in ways that protect lake water quality, wildlife habitat and property values while enjoying their time at the lake. Learn more.
Milfoil on the Lake
MLPOA works with NHDES to control the invasive Eurasian water milfoil on the lake. We are expecting the spring NHDES survey to take place soon. Learn more.
Quick Links
Best Practices
Minimize Human Disturbance
TIP: Eliminate Chemicals: Do not use fertilizers, pesticides, or herbicides near the water.
Why: Nutrients from fertilizers cause harmful algae blooms, which deplete oxygen for fish.
Curious about other Best Practices? All past Tips can be found on our Facebook page.
Lake Monomonac
Rindge, NH & Winchendon, MA
2.7 miles long with 16.3± miles of shoreline. 711 total acres: 594 acres in NH and 117 acres in MA. Maximum recorded depth 28 feet.
456 properties: 210 in New Hampshire and 246 in Massachusetts.
